Child Carrier Apparatus

ABSTRACT

A child carrier apparatus can comprise a base frame having a tube segment that is affixed with an attachment fixture, and a detachable seat including a tubular support, and a coupling element mounted at a side segment of the tubular support. The inclination of the tubular support is adjustable relative to the coupling element, and the coupling element is configured to detachably locked with the attachment fixture via a latch to hold the seat with the base frame.

CROSS-REFERENCE TO RELATED APPLICATION(S)

This application claims priority of China Patent Application No.201010613144.6 filed on Dec. 20, 2010.

BACKGROUND OF THE INVENTION

1. Field of the Invention

The present invention relates to child carrier apparatuses, and moreparticularly to child carrier apparatuses having rear seats.

2. Description of the Related Art

Some current strollers may include front and rear seats to accommodatemore than one child at a time. The stroller with front and rear seatsdiffers from conventional strollers with a single front seat byincluding additional support tubes for affixing the rear seat. Moreover,child strollers with front and rear seats may generally have two typesof construction: a first type has the rear seat permanently affixed withthe stroller frame, and a second type has the rear seat detachablymounted with the stroller frame so that it can be removed from the childstroller. For detaching the rear seat, the child stroller frame usuallyincludes a resilient element having a side portion provided with aprotrusion, and the rear seat may have a seat support tube provided witha hole corresponding to the protrusion. When the rear seat is installedwith the stroller frame, the protrusion of the resilient element canengage with the hole to lock the seat support tube with the strollerframe. When the caregiver wants to remove the rear seat, the protrusioncan be depressed to disengage from the hole of the seat support tube.Being unlocked, the rear seat then can be detached from the strollerframe.

However, the conventional constructions may not be convenient to operatefor removing the rear seat. Moreover, no recline adjustment of the seatis permitted.

Therefore, there is a need for an improved child carrier apparatushaving a detachable rear seat that is adjustable in angular position andaddress at least the foregoing issues.

SUMMARY

The present application describes a child carrier apparatus having aseat that is detachable and adjustable in inclination. In someembodiments, the child carrier apparatus can comprise a base framehaving a tube segment that is affixed with an attachment fixture, and adetachable seat including a tubular support structure, and a couplingelement mounted at a side segment of the support structure. Theinclination of the support structure is adjustable relative to thecoupling element, and the coupling element is configured to detachablylocked with the attachment fixture via a latch to hold the seat with thebase frame.

In other embodiments, the child carrier apparatus can comprise a baseframe having a tube segment that is affixed with an attachment fixture,and a detachable seat including a tubular support structure that isconfigured to fasten with the attachment fixture to hold the seat withthe base frame. The attachment fixture and the support are locked witheach other via a latch, and the support structure includes a releasemechanism that is operable to drive movement of the latch from a lockingposition to an unlocking position to allow removal of the seat from thebase frame.

The foregoing is a summary and shall not be construed to limit the scopeof the claims. The operations and structures disclosed herein may beimplemented in a number of ways, and such changes and modifications maybe made without departing from this invention and its broader aspects.Other aspects, inventive features, and advantages of the invention, asdefined solely by the claims, are described in the non-limiting detaileddescription set forth below.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a perspective view illustrating an embodiment of a childcarrier apparatus;

FIG. 2 is a side view of the child carrier apparatus shown in FIG. 1;

FIG. 3 is a schematic view illustrating a second seat of the childcarrier apparatus shown in FIG. 1;

FIG. 4 is a schematic view illustrating the construction of a tubularsupport structure and a coupling element in the second seat;

FIGS. 5 and 6 are schematic views illustrating an adjustment of thesecond seat relative to the coupling element;

FIGS. 7-10 are schematic views illustrating the assembly of the secondseat and the base frame;

FIG. 11 is a schematic view illustrating the latch in an unlocked state;

FIG. 12 is a perspective view illustrating another embodiment of a childcarrier apparatus;

FIG. 13 is a cross-sectional view illustrating how a tubular supportstructure of a seat locks with an attachment fixture in the childcarrier apparatus shown in FIG. 12; and

FIG. 14 is a schematic view illustrating the operation of a releasemechanism in the child carrier apparatus shown in FIG. 12.

DETAILED DESCRIPTION OF THE EMBODIMENTS

FIGS. 1 and 2 are respectively perspective and side views illustratingan embodiment of a child carrier apparatus 100. The child carrierapparatus 100 is exemplary a stroller apparatus. The child carrierapparatus 100 can include a base frame 102, a pair of front supporttubes 104, a pair of rear support tubes 106, a first seat 108, a handle110, a pair of joint structures 112 and a second seat 114.

The base frame 102 can include two tube segments 116. In one embodiment,the two tube segments 116 may be assembled to form a unitary body havinga generally V-shape, such that the distance between the front ends ofthe two tube segments 116 is smaller than the distance between the rearends of the tube segments 116. The front ends of the two tube segments116 can be respectively assembled with a bracket 118. An underside ofthe bracket 118 can be pivotally connected with a front wheel mount 120that in turn is pivotally assembled with a front wheel 124. The frontwheel mount 120 can rotate to change the direction of displacement ofthe stroller. An upper side of the bracket 118 can be mounted with afootrest board 126 on which a child sitting on the first seat 108 canplace the feet. The rear end of each tube segment 116 can be assembledwith a rear wheel 128. A storage basket 129 is mounted between two tubesegments 116 at a location below the footrest board 126. A partial orentire area of the storage basket 129 can be provided with a plasticboard on which a child sitting on the second seat 114 can place thefeet.

The front support tubes 104 and rear support tubes 106 can be providedat the left and right sides of the child carrier apparatus 100, anderect upward from the base frame 102. A lower end of each front supporttube 104 can be pivotally connected with a front portion of onecorresponding tube segment 116. A lower end of each rear support tube106 can be pivotally connected with a rear portion of one correspondingtube segment 116, and mounted with a shock absorber 130.

The handle 110 can include two side tube segments 110A, and a transversetube segment 110B connected between the two side tube segments 110A. Thetransverse tube segment 110B can be grasped by a caregiver to push orpull the stroller apparatus.

On each of the left and right sides, the joint structure 112 can berespectively connected with the upper ends of the front and rear supporttubes 104 and 106 and the lower ends of the side tube segments 110A.When the child carrier apparatus 100 is deployed in use, the jointstructures 112 can respectively lock the front support tubes 104 and thehandle 110 in place. When the child carrier apparatus 100 is collapsedfor storage, the joint structures 112 can respectively unlock the frontsupport tubes 104 and the handle 110, such that the front and rearsupport tubes 104 and 106 and the handle 110 can rotate and fold overone another.

The first seat 108 can be assembled between the front and rear supporttubes 104 and 106, and can be used as a front seat of the child carrierapparatus 100. The first seat 108 can include a seat board 108A and abackrest board 108B. A lower end of the backrest board 108B can beconnected with a rear portion of the seat board 108A. A front portion ofthe seat board 108A can be pivotally connected between the front supporttubes 104. In order to adjust the inclination of the first seat 108, aseat adjustment mechanism 132 can be respectively mounted at each of theleft and right sides of the first seat 108. Each of the seat adjustmentmechanisms 132 can have an upper portion and a lower portionrespectively assembled with one corresponding joint structure 112 andthe rear portion of the seat board 108A.

The second seat 114 can be assembled with the base frame 102 at aposition behind the first seat 108, and can be used as a rear seat ofthe child carrier apparatus 100. In one embodiment, the second seat 114can be a detachable seat. According to the needs, the second seat 114can be selectively coupled to the base frame 102, or removed from thebase frame 102.

FIG. 3 is a schematic view illustrating the second seat 114. As shown inFIGS. 1-3, the second seat 114 can include a tubular support structure142, and a seat portion 144 affixed with the support structure 142. Thesupport structure 142 can have a generally U-shape including left andright side segments and a transverse segment. In one embodiment, the twoside segments and the transverse segment can be formed in an unitarybody. Moreover, each side segment of the support structure 142 can havea distal end respectively mounted with a coupling element 146. Thesecond seat 114 can be detachably fastened with the base frame 102 viaengagement of the coupling elements 146 with corresponding structuresprovided on the base frame 102.

Each of the coupling elements 146 can have a shell body 146A, and amount portion 146B projecting from a side of the body 146A. The body146A can have an inner cavity through which one distal end of thesupport structure 142 is movably assembled. The mount portion 146B canbe formed as a tubular portion. The mount portion 146B can be insertedinto an attachment fixture 150 affixed with the tube segment 116.Moreover, an interior of the mount portion 146B can be mounted with alatch 174 (better shown in FIGS. 7 and 8) that can come into lockingengagement with the attachment fixture 150 to lock the second seat 114with the base frame 102. In order to switch the latch 174 to an unlockedstate, the second seat 114 can be provided with a release mechanism 152including an actuator element 154 and a cable 156. Exemplaryconstruction of the release mechanism 152 and latch 174 is describedhereafter with reference to FIGS. 7-11.

FIG. 4 is a schematic view illustrating the construction of the supportstructure 142 and the coupling element 146. The body 146A of thecoupling element 146 can have an inner cavity 160. One distal end of thesupport structure 142 can be received in the inner cavity 160 of thebody 146A, and pivotally connected with the coupling element 146 via apivot shaft 162. As a result, the support structure 142 can rotaterelative to the coupling element 146 to adjust an inclination of thesupport structure 142 and the second seat 114.

The inner cavity 160 of the body 146A can also include a plurality oflocking grooves 162A and 162B that are disposed in different radialdirections relative to the pivot shaft 162. One associated distal end ofthe support structure 142 can be provided with a latch portion 164.Depending on the angular position of the support structure 142 relativeto the coupling element 146, the latch portion 164 can engage with oneof the locking grooves 162A and 162B. In order to perform locking andunlocking operations, the latch portion 164 can be mounted such that itcan displace in radial directions relative to the pivot shaft 162. Inone embodiment, the latch portion 164 can be securely affixed with thesupport structure 142 (e.g., the latch portion 164 can be formed by thedistal end of the support structure 142), and the pivot shaft 162 can bemounted through an elongated slot 166 formed through the supportstructure 142. The support structure 142 and the latch portion 164 canthereby slide in unison relative to the pivot shaft 162. Moreover, aninterior of the support structure 142 can be mounted with a spring 168that can bias the latch portion 164 to engage with any of the lockinggrooves 162A and 162B. In one embodiment, the spring 168 can be wrappedaround an elongated extension 169 provided in the support structure 142,one end of the spring 168 being abutted against the pivot shaft 162,another end of the spring 168 being abutted against a flange 169A of theextension 169.

FIGS. 5 and 6 are schematic views illustrating an adjustment of thesecond seat 114 relative to the coupling element 146. For the sake ofclarity, FIGS. 5 and 6 only show the support structure 142 of the secondseat 114. When the support structure 142 is pulled up, the latch portion164 can disengage from one of the locking grooves (e.g., the lockinggroove 162A) and compress the spring 168. The second seat 114 then canbe driven to rotate about the pivot shaft 162 relative to the couplingelement 146. When the second seat 114 is adjusted to a desiredinclination, the support structure 142 can be released. The spring 168then can urge the support structure 142 and the latch portion 164 inmovement such that the latch portion 164 can engage with another lockinggroove (e.g., the locking groove 162B). Once the latch portion 164 isengaged with the locking groove 162B, two opposite limiting surfaces163A and 163B of the locking groove 162B can block rotation of the latchportion 164. The engagement of the latch portion 164 with the lockinggroove 162B can hold the second seat 114 in a rearward reclinedposition. The engagement of the latch portion 164 with the lockinggroove 162A can hold the second seat 114 in a more upright seatingconfiguration.

After the second seat 114 is installed with the base frame 102, thecaregiver can easily modify the support structure 142 and seat portion144 of the second seat 114 relative to the base frame 102 via theaforementioned mechanism. The angular position of the second seat 114can be thereby adjusted to provide comfortable sitting to the child.

It is worth noting that other constructions may be applicable forlocking the second seat in place. For example, the latch portion mayalso be movably assembled with the support structure 142 so that it canbe retracted or extended from a tubular segment of the support structure142. The support structure 142 can further include a release actuator,and a cable (not shown) connected with the latch portion and the releaseactuator. By operating the release actuator, the latch portion can bedriven in movement relative to the support structure 142 to disengagefrom any of the locking grooves 162A and 162B. Once the seat is adjustedto the desired angular position, the spring can urge the latch portionto engage with another locking groove to securely hold the seat inplace.

FIGS. 7-10 are schematic views illustrating the assembly of the secondseat 114 and the base frame 102. As shown in FIG. 7, the attachmentfixture 150 can be affixed with the base frame 102. The attachmentfixture 150 can include a slot 170, and an opening 172 adjacent to asidewall of the slot 170. The coupling element 146 can be assembled withthe support structure 142 of the second seat 114, and the mount portion146B of the coupling element 146 can be inserted through the slot 170 ofthe attachment fixture 150 to position the second seat 114 on the baseframe 102. Once the second seat 114 is positioned on the base frame 102(as shown in FIG. 8), the latch 174 of the mount portion 146B can bedriven by a spring force to engage with the opening 172 to securelyfasten the second seat 114 with the base frame 102. The latch 174 canmove relative to the coupling element 146 to either protrude outward themount portion 146B or retract toward the interior of the mount portion146B, whereby the coupling element 146 and the attachment fixture 150can be locked together or unlocked from each other.

FIG. 9 is a partial cross-sectional view illustrating how the couplingelement 146 engages with the attachment fixture 150 and locked therewithvia the latch 174. The latch 174 can be mounted in the mount portion146B of the coupling element 146, and is movable parallel to a firstaxis D1. The spring 176 can be assembled between the latch 174 and aninner sidewall of the mount portion 146B. When the mount portion 146B isinserted through the slot 170 of the attachment fixture 150, the spring176 can urge the latch 174 to protrude outward from an opening 177formed through the mount portion 146B and engage with the opening 172 ofthe attachment fixture 150. The second seat 114 can be thereby locked inposition with the base frame 102.

For unlocking the latch 174, a driving element 178 can be assembled inthe mount portion 146B of the coupling element 146 at a locationadjacent to the latch 174. The driving element 178, the cable 156 andthe actuator element 154 (shown in FIG. 3) can form the releasemechanism 152. FIGS. 9 and 10 illustrate the assembly of the drivingelement 178 and the latch 174. The interior of the mount portion 146Bcan be provided with a guide track 180 along which the driving element178 is guided in movement parallel to a second axis D2 generallyperpendicular to the first axis D1.

As shown in FIG. 10, the driving element 178 can have an elongatedshape. An end portion of the driving element 178 can be provided with anopening 182 into which an end of the cable 156 can be securely fitted.The driving element 178 can further include a slot 184 at a positionspaced apart from the opening 182. Ribs 186 can be respectivelyprotruding from two sides of the slot 184, each of the ribs 186 havingan edge formed with an angled surface 186A.

The latch 174 can be movably mounted through the slot 184 of the drivingelement 178. A side of the latch 174 adjacent to the spring 176 can beprovided with a flange 174A having an angled surface 174B in slidingcontact with the angled surface 186A of the rib 186. As the drivingelement 178 moves parallel to the second axis D2, the sliding contactbetween the angled surfaces 186A and 174B can guide the latch 174 tomove parallel to the first axis D1. With the aforementionedconstruction, the required space for assembling the latch 174 and thedriving element 178 can be reduced.

Referring again to FIGS. 8 and 9, the cable 156 can extend outward froman opening 188 of the coupling element 146, travel into a tubularsegment of the support structure 142 through an opening 190 thereof, andextend at least partially along the hollow interior of the supportstructure 142 to connect with the actuator element 154. The actuatorelement 154 can be movably assembled on the support structure 142 (asshown in FIG. 3) at a position spaced away from the mount portion 146B.Accordingly, a caregiver can operate the actuator element 154 to unlockthe latch 174 via movement transmission through the cable 156 and thedriving element 178.

FIG. 11 is a schematic view illustrating the latch 174 in an unlockedstate. When a pulling action is applied on the actuator element 154(shown in FIG. 3), the cable 156 can pull the driving element 178 tomove upward parallel to the second axis D2. Owing to the sliding contactbetween the angled surfaces 186A and 174A, the latch 174 can be pushedto move parallel to the first axis D1 toward the interior of the mountportion 146B. As a result, the latch 174 can shift from the lockingposition shown in FIG. 9 to the unlocking position shown in FIG. 11which is disengaged from the opening 172. Then the caregiver can removethe mount portion 146B of the coupling element 146 from the attachmentfixture 150 to detach the second seat 114.

When the second seat 114 is to be installed on the base frame 102, themount portion 146B of the coupling element 146 can be inserted throughthe slot 170 of the attachment fixture 150. The spring 176 then can urgethe latch 174 to engage with the opening 172 of the attachment fixture150, whereby the second seat 114 can be locked with the base frame 102.

It is worth noting that the latch element 174 and the release mechanism152 do not have to be necessarily used in association with theadjustable coupling element 146. In alternate embodiments where thesecond seat 114 does not need adjustment functionality, the same latch174 and release mechanism 152 may also be directly assembled with eachend portion of the support structure 142 (e.g., the latch 174 can bemounted through each distal end of the support structure 142). Thesupport structure 142 in turn can be directly inserted through theattachment fixture 150 such that the latch 174 can directly lock withthe attachment fixture 150. Likewise, the release mechanism 152 can beoperated to unlock the latch element 174.

FIG. 12 is a perspective view illustrating another embodiment of a childcarrier apparatus 200. The child carrier apparatus 200 can include abase frame 202, and a seat 204 detachably assembled on the base frame202. In one embodiment, the seat 204 can include a tubular supportstructure 206 having a generally U-shape, and a seat portion 207 (shownwith dashed lines).

The base frame 202 can be similar to the previous embodiment inconstruction, including two tube segments 208 assembled to form aunitary body having a generally V-shape. The front ends of the two tubesegments 208 can be respectively assembled with a bracket 212. Anunderside of the bracket 212 can be pivotally connected with a frontwheel mount 214 that in turn is pivotally assembled with a front wheel216. The front wheel mount 214 can rotate to change the direction ofdisplacement of the stroller. An upper side of the bracket 212 can bemounted with a footrest board 218 having a generally triangular shape onwhich a child sitting on another seat 219 (shown with dashed lines) canplace the feet. The seat 219 can be disposed in front of the seat 204,such that the seats 219 and 204 can be respectively used as front andrear seats of the child carrier apparatus 200. A rear portion of eachtube segment 208 can be respectively assembled with a rear wheel 220.

The base frame 202 can include two attachment fixtures 230. In oneembodiment, the two attachment fixtures 230 can be respectively affixedwith the rear portions of the two tube segments 208. Each of theattachment fixtures 230 can include a tubular segment 232 and a latch234. The support structure 206 can have side distal ends that canrespectively receive the insertion of the tubular segments 232 and locktherewith via the latch 234 to removably attach the seat 204 with thebase frame 202.

FIG. 13 is a cross-sectional view illustrating how the support structure206 of the seat 204 locks with the attachment fixture 230. The latch 234can be provided in the tubular segment 232 of the attachment fixture230. In one embodiment, the latch 234 can be formed as a bent orU-shaped resilient part having a side portion provided with a stud 234Athat can protrude outward from an opening 236 of the tubular segment232. After the tubular segments 232 are inserted through the side distalends of the support structure 206, the elasticity of the latch 234 cancause the studs 234A to respectively engage with corresponding openings206A provided on the support structure 206, whereby the seat 204 isattached with and cannot be detached from the base frame 202.

Moreover, the left and right side distal ends of the support structure206 can be respectively provided with release mechanisms 240. Each ofthe release mechanisms 240 can be actuated to unlock the correspondinglatch 234. As shown in FIG. 13, the release mechanism 240 can include asleeve 242, and a resilient actuator element 244 extending from thesleeve 242 and located at a position corresponding to the opening 206A.In one embodiment, the actuator element 244 can be integrated with thesleeve 242.

FIG. 14 is a schematic view illustrating the operation of the releasemechanism 240. When the seat 204 is attached with the base frame 202,the stud 234A of each latch 234 can respectively engage with the opening206A of the support structure 206. Moreover, the actuator element 244can be positioned in substantial alignment with the position of the stud234A. In case the caregiver wants to remove the seat 204 from the baseframe 202, the actuator element 244 can be pressed toward the stud 234A.As a result, the actuator element 244 can push the latch element 234 tomove from the locking position shown in FIG. 13 to the unlockingposition shown in FIG. 14 in which the stud 234A disengages from theopening 206A of the support structure 206. The seat 204 then can beremoved from the base frame 202.

It is worth noting that while the latch 234 and the release mechanism240 have been described as being respectively provided in the attachmentfixture 230 and the support structure 206, the positions where theseparts are installed may also be interchanged in alternate embodiments.For example, rather than inserting the tubular segment 232 into thesupport structure 206, the tubular segment 232 may be sized to receivethe insertion of the distal end of the support structure 206. In thiscase, the latch 234 may be installed in the tube segment of the supportstructure 206, whereas the release mechanism 240 may be provided on thetubular segment 232 of the attachment fixture 230. Locking and unlockingoperations for this variant embodiment will be similar.

With the child carrier apparatus described herein, the caregiver caneasily remove and install the rear seat. After it is installed with thesupport frame of the child carrier apparatus, the rear seat can also beadjusted to modify its inclination. While the detachable seat structuresdescribed herein are exemplary applied to rear seats, alternateembodiments may also have front seats having similar constructions andfunctions. Moreover, the embodiments described herein show rear andfront seats that are placed in a same orientation, i.e., the front andrear seats can receive the placement of a child facing forward. However,alternate embodiments may also provided front and rear seats that areplaced in opposite orientations, i.e., one seat (e.g., the front seat)is facing forward while the other seat (e.g., the rear seat) is facingrearward.

Realizations in accordance with the present invention therefore havebeen described only in the context of particular embodiments. Theseembodiments are meant to be illustrative and not limiting. Manyvariations, modifications, additions, and improvements are possible.Accordingly, plural instances may be provided for components describedherein as a single instance. Structures and functionality presented asdiscrete components in the exemplary configurations may be implementedas a combined structure or component. These and other variations,modifications, additions, and improvements may fall within the scope ofthe invention as defined in the claims that follow.

1. A child carrier apparatus comprising: a base frame having a tubesegment that is affixed with an attachment fixture; and a detachableseat including a tubular support structure, and a coupling elementmounted at a side segment of the support structure; wherein aninclination of the support structure is adjustable relative to thecoupling element, and the coupling element is configured to detachablylocked with the attachment fixture via a latch for holding the seat withthe base frame.
 2. The child carrier apparatus according to claim 1,wherein the coupling element includes a mount portion of a tubularshape, and when the coupling element is locked with the attachmentfixture, the mount portion inserts into the attachment fixture and thelatch respectively engages through corresponding openings formed throughthe mount portion and the attachment fixture.
 3. The child carrierapparatus according to claim 2, wherein the latch is assembled in themount portion, and is movable between a locking position and anunlocking position.
 4. The child carrier apparatus according to claim 3,wherein the latch is biased toward the locking position by a springforce.
 5. The child carrier apparatus according to claim 2, wherein theseat includes a release mechanism operable to unlock the latch.
 6. Thechild carrier apparatus according to claim 5, wherein the releasemechanism includes: a driving element assembled in the mount portion ata position adjacent to the latch; an actuator element movably assembledwith the support structure at a position spaced apart from the mountportion; and a cable extending at least partially along the supportstructure and having two ends respectively connected with the drivingelement and the actuator element; wherein the actuator element isoperable to drive the latch to the unlocking position via the connectionof the cable and the driving element.
 7. The child carrier apparatusaccording to claim 6, wherein the latch is movable parallel to a firstaxis, and the driving element is movable parallel to a second axisgenerally perpendicular to the first axis.
 8. The child carrierapparatus according to claim 7, wherein the driving element includes aslot through which the latch is movably assembled.
 9. The child carrierapparatus according to claim 1, wherein the support structure and thecoupling element are pivotally connected each other via a pivot shaft,the coupling element includes a plurality of holding grooves disposed indifferent radial directions relative to the pivot shaft, and the supportstructure is adapted to lock with any of the holding grooves to hold theseat at different angular positions.
 10. The child carrier apparatusaccording to claim 9, wherein the support structure includes a latchportion that is movable in a radial direction relative to the pivotshaft to engage with or disengage from any of the holding grooves. 11.The child carrier apparatus according to claim 10, wherein the latchportion is formed by a distal end of the support structure, and thepivot shaft is mounted through an elongated slot of the supportstructure such that the support structure is operable to slide relativeto the pivot shaft.
 12. The child carrier apparatus according to claim1, wherein the seat is a rear seat, and the child carrier apparatusfurther comprises a front seat disposed in front of the rear seat.
 13. Achild carrier apparatus comprising: a base frame having a tube segmentthat is affixed with an attachment fixture; and a detachable seatincluding a tubular support structure that is configured to fasten withthe attachment fixture to hold the seat with the base frame; wherein theattachment fixture and the support structure are locked with each othervia a latch, and the support structure includes a release mechanism thatis operable to drive movement of the latch from a locking position to anunlocking position to allow removal of the seat from the base frame. 14.The child carrier apparatus according to claim 13, wherein theattachment fixture includes a tubular segment, and the support structureand the tubular segment are configured to insert at least partially intoeach other when the seat is affixed with the base frame.
 15. The childcarrier apparatus according to claim 14, wherein the latch is adapted tocome into locking engagement with corresponding openings formed throughthe tubular segment and the support structure to lock the supportstructure with the attachment fixture.
 16. The child carrier apparatusaccording to claim 15, wherein the latch is a resilient element having abent shape, the latch being assembled with either of the tubular segmentand the support structure.
 17. The child carrier apparatus according toclaim 15, wherein the release mechanism includes an actuator elementthat is operable to push the latch out of the locking engagement. 18.The child carrier apparatus according to claim 13, wherein the latch isassembled with a distal end of the support structure, and the releasemechanism includes: a driving element assembled adjacent to the latch;an actuator element movably assembled with the support structure; and acable extending at least partially along the support structure andhaving two ends respectively connected with the driving element and theactuator element; wherein the actuator element is operable to drive thelatch to the unlocking position via the connection of the cable and thedriving element.
 19. The child carrier apparatus according to claim 13,wherein the seat further includes a coupling element mounted at a sidesegment of the support structure, an inclination of the supportstructure being adjustable relative to the coupling element.
 20. Thechild carrier apparatus according to claim 14, wherein the detachableseat is a rear seat, and the child carrier apparatus further includes afront seat placed in front of the rear seat.